Estimated value of $170 Hackmanite Cabochon sourced and cut in Mogok, Myanmar. Pink and white stone turns to purple and white under UV light!
This material is known for having strong tenebrescence. Tenebrescence is the ability of a mineral to change color when exposed to light, in this case a UV light. The phenomena will reverse itself after a few minutes to a few hours and can be repeated again and again.